• Journal of the korean veterinary medical association
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• v.52 no.12
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• pp.714-716
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• 2016

충치와 치석의 원인인 플라그를 줄이기 위해서는 플라그의 원인인 구강내 세균을 줄이기 위해서 클로르헥시딘 제품이 나와 있고, 충치의 원인인 탈회를 줄이기 위해서는 제한급식을 하고 자기 전에 간식을 주면 안된다. 아울러 불소는 재석회화를 촉진시키므로 충치예방에 필수적이다 고양이는 충치가 없기 때문에 불소도포는 필요하지 않다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1289-1291
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• 2015

본 논문에서는 충치 환자의 진단을 위해 구강 영상에서 충치를 추출하는 방법을 제안한다. 먼저 구강은 붉은색을 띄고 치아는 흰색을 띈다는 특징이 있기 때문에, 구강 영상을 YCbCr 컬러모델로 변환한다. YCbCr 컬러모델에 임계치를 설정하여 붉은 영역을 검출해내고, 검출된 붉은 영역에 대해 이진화하여 치아 영역을 추출한다. 그 후, 모폴로지 기법을 이용하여 잡음 제거 및 치아의 빈 공간을 채운다. 치아 영역 추출 시 영상에 따라 치아 사이를 잇는 모서리 부분이 손실된 경우가 발생할 수 있기 때문에 치아 사이의 손실된 부분을 연결 한다. 치아 영역에 ART2 알고리즘을 적용하여 클러스터링하고 충치 후보 영역을 추출한다. 충치 후보 영역에 8방향 윤곽선 추적 기법을 적용하여 충치를 분석 및 추출한다. 실험 결과 81%의 추출 성공률을 보였고 다양한 형태의 충치를 효과적으로 추출할 수 있는 것을 확인하였다.

• Journal of Nutrition and Health
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• v.41 no.8
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• pp.809-817
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• 2008

This study was conducted to provide basic information snack intake frequency, eating patterns and current dental caries in high school students. A total of 626 students (333 males, 293 females) in Gimhae city participated in this study. The survey conducted by using a self-administered questionnaire in January, 2008. Dental caries-related information was obtained during the students' physical examination at the designated clinical hospital in 2007. The results were as follows. Sixty three point nine percent of the students were shown to have dental caries, which includes a sealant. The average number of dental caries was 3.1, which was greater in female than in male students (p < 0.001). Eighty six percent of the students were shown to maintain correct toothbrushing habits to prevent dental caries. Twenty percent of the participants brushed there teeth ‘instantly’ a meal or snack, and 27.3% of the participants brushed there teeth, gum and tongue, and 58.9% of the participants received toothbrushing education. In snack intake frequency, participants with no dental caries had preference to white milk whereas those with dental caries had preference to snacks such as chewing gums and carbonated beverages. Female students were shown to have more dental caries maybe because of their higher snack intake frequency in chocolate, cookies and chips, yoghurt and ice-cream. Dental caries did not affect eating behaviors. This study suggests that more education for correct toothbrushing and cariogenic and detergent foods are needed for better dental hygiene.

• Korean Journal of Food Science and Technology
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• v.35 no.6
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• pp.1221-1225
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• 2003

As an effort to select powerful anti-cariogenic materials from natural resources, various plant extracts were examined for their anti-S. mutans and anti-glucosyltransferase (GTase) activities. The ethanol extracts of licorice bark, which was produced after water extraction of licorice, showed the most powerful anti-S. mutans as well as anti-GTase activities. When licorice bark was consecutively fractionated with n-hexane, chloroform, ethylacetate, and butanol, the chloroform fraction exhibited the strongest anti-S. mutans activites. This fraction was further fractionated into 4 fractions through a silica gel column, and according to HPLC analysis, anti-S. mutant activities seemed to come mostly from relatively hydrophobic materials.

• 건강소식
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• v.30 no.12 s.337
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• pp.16-17
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• 2006

• RED RIBBON
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• s.66
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• pp.16-17
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• 2005

에이즈 환자에게서 흔히 나타나는 구강 내 병변은 충치, 구강칸디다증, 구강 모상 백반증(oral hairy leukoplakia),재발성 아프타성 구내염(recurrent aphthous stomatitis),재발성 포진성 구내염(recurrent herpetic stomatitis),치주염, 카포시 육종, 비호치킨성 림프종 등이다. 이 중 에이즈 환자에게 비교적 특징적인 병변은 구강 칸디다증, 입안털백색판증, 카포시 육종 등이지만 일반인들에서 흔히 관찰되는 충치라고 하더라도 치주염이나 농양으로 빠르게 진행한다면 에이즈를 의심해 보아야 하며, 반복적인 아프타성 궤양이나 포진성 궤양이 유달리 크고 오래 지속된다면 역시 에이즈의 가능성을 생각해 봐야 한다. 구강 병소는 에이즈 환자에게서 흔히 발견되며 이 질환의 초기 상태를 제시할 수 있다는데 의의가 있다.

• Applied Biological Chemistry
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• v.41 no.5
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• pp.395-398
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• 1998

To develop the natural antibacterial agents which don't have any toxicity against man, collected several species of medicinal plants were tested for their antibacterial activity and inhibition effect on organic acids production from Streptococcus mutans. Among the tested medicinal plants, methanol extracts and n-hexane fraction of Juniperus rigida S. et Z. had the comparatively strong activities. For example, strong antibacterial effect against S. mutans were showed in methanol extracts, n-hexane and chloroform fractions. Organic acids production were reduced to 89.3 and 90.8% of control in methanol extracts and n-hexane fraction treated concentration of 1 mg/ml, respectively.

• Korean Journal of Food Science and Technology
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• v.43 no.6
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• pp.783-786
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• 2011

Various mushroom extracts were examined for their anti-Streptococcus mutans and anti-glucosyltransferase (GTase) activities. Mushrooms were extracted with chloroform, methanol, acetone, ethyl acetate, and distilled water. The chloroform, methanol, and ethyl acetate extracts showed higher antimicrobial activity than that of the others. The inhibitory effects of the chloroform, methanol, and ethyl acetate extracts of Lyopyllum ulmarium, which have high anti-microbial and GTase activities, on the growth of S. mutans were examined and the optimal ratio of solvents was also evaluated to investigate the influence of solvents using a simplex centroid design. The anti-cariogenic effects of the L. ulmarium extract on S. mutans was influenced by the solvent, and the optimum anti-cariogenic activity of the extract was obtained with the ratio of chloroform:methanol:ethyl acetate=1:1:1 (v/v/v). These results suggest that solvent selection is an important factor to extract anti-cariogenic materials effectively from mushrooms.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.934-937
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• 2011

As part of our screening of anticariogenic agents from medicinal plants, the ethanol extracts of 10 herbs widely used in the fork medicine were tested for the antimicrobial activity against a cariogenic bacterium Streptococcus sobrinus. The ethanol extracts of Dryopteris crassirhizoma showed antimicrobial activities against S. sobrinus. These results suggested that the extracts of Dryopteris crassirhizoma could be the potential source of antimicrobial agent against S. sobrinus.

• Applied Biological Chemistry
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• v.51 no.1
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• pp.84-87
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• 2008

In this research, we screened for glucosyltransferase (GTase) inhibitors that effectively prevent the dental caries from 420 kinds of boiled water extracts of herbs and wild plants and searched for GTase inhibitory activities. Among them, 13 kinds of hot water extracts had high GTase inhibitory activities and especially, we focused on Foeniculum vulgare which showed the highest inhibitory activity on GTase. The boiled water extract of F. vulgare was stable at high temperature and showed as a mixed type of competitive and uncompetitive inhibition kinetic behavior. It did not have antibacterial effect on Streptococcus mutans and had inhibitory activity on GTase. Specially, in the clinical trial, the group treated by boiled water extract of F. vulgare showed more decrease of plague index at 4.8 point than untreated group. These results suggested that boiled water extract of F. vulgare can effectively suppress the plague formation as it inhibits the GTase activity.